Turkish police have detained three people, including a Belgian man of Moroccan origin suspected of being an Islamic State group scout, a Turkish news agency reported Saturday. The detainees are suspected to have been involved in last week’s coordinated shootings and suicide bombings in Paris.

Ahmet Dahmani, 26, was detained at a luxury hotel in the southern coastal city of Antalya, the Dogan news agency said, according to Reuters. Dogan reported that Dahmani is suspected to have explored areas in Paris a week before the attacks. The report also said that two other people, both Syrian cit...